Ventilator.



J. ,K. ROBINSON.

VENTILATOR.

APPLICATION FILED APR. 1, 1913.

1,076,451 v Pd tented Oct. 21, 1913.

' WITNESSES I mm/rofl Arm/mm Jan/5 K foam/50w,

JAMES E. ROBINSON, OF LITTLE ROCK, ARKANSAS.

VENTILATOR.

Specification of Letters Patent. Application filed April 1, 1913. Serial No. 758,150.

rammed on. 21. acre.

To aZZ whom it may concern:

Be it known that I, JAMES K. ROBINSON, a. citizen of the United States, and a resident of Little Rock, in the county of Pulaslciand State of Arkansas, have made certain new and useful Improvements in Ventilators, of which the following is a specification.

My invention relates to ventilators, and partlcularly to ventilators of the type used within and upon buildingsfor the purpose of maintaining circulation of .air in attics, rooms, halls and other parts of the edifice. My ventilator may be'also employed in connection with the discharge of smoke, gases and vapors from buildings, and also from analogous structures.

More particularly stated my invention comprehends a ventilator provided with a stationary draft member such as pipe, flue,

or chimney, and a cowl journaled upon said member and provided with means for shifting the cowl under control of the wind into difi'erent angular positions, the cowl being provided with means for facilitating the travel of air through t-he draft member, thus forcing a draft within the latter.

My invention further relates to improved mechanism for'enabling air currents or transientwinds to produce or increase, by aspiration, forced drafts within the draft member, and for making such drafts relatively strong in proportion to the strength of. the

- wind controlling them.

My invention further contemplates varione improvements in the construction of ventilators for the purpose of increasing the general efficiency thereof. g

Reference is made to the accompanying drawing forming a part of this specification,

40. and. in which like letters indicate like parts.

Figure 1 is a substantially centralvertical section through my improved ventilator. Fig. 2 is an elevation of the same. Fig. 3 is a section substantially on the broken line 3 3 of Fig. 1 looking inthe direction of the arrow. Fig. 4 is a detail showim in perspective the upper portion of the (li'aft member and parts carried thereby. I

A funnel 5, adapted to extend upwardly or outwardly from the portion of the building to be ventilated, carries 2 cylinder 6, these parts together constituting a draft pipe-or draft member. Mounted upon the cylinder 6 is a flange 7 of substantially frusto-conical form. An arch 8, made preferably of strap metal and having the/form indicated in,

Figs. 1 and 4., is mounted upon the upper end of the cylinder 6 and extends upwardly therefrom. A. bridge 9, made also prefer ably of strap metal, extends diametrically across the cylinder 6, and isat its endsconnected with said cylinder and with the adgacent ends of the arch 8. The bridge 9 is provided with a hole 9 as will be under stood from Fig. i. The bridge 9 carries a stirrup lt) secured rigidly to its underside. The arch 8 is provided with a hole 11 which is in ali-nementwith the hole 9", as will be understood from. Fig. 4E.

A cow-l 12 carries two fins 13 secured rigidly within it and extending outwardly, as will be understood from Figs. 1 and 3. These fins diverge from each other and are displaced angular-1y in relation to each. othe'ri by 95 to 120 degrees.

A supporting stem 14 is provided with a.

shaft portion 15 which extends throughthe holes 11., 9 and. rests upon the stirrup 10. The stem l l is further provided with a leaf portion 16 which is secured to the cowl 12 at the top thereof, as indicated in Fig. .1.

A vane 17 is mounted upon the cowl and is of suitable form to enable the cowl to be shifted by the wind. The cowl 12 at its lower end is provided with a flange 18 which is of substantially .frusto-conical form. A pin 19 extends through the shaft portion 15 and supports a washer 20, the latter encircling the shaft portion 15 and'being located just below the' top of the arch 8.

When the parts are in posit-ion, as indicat-ed in Figs. 1 and 2, the flange 18 is spaced apart from the flange 7 by a suitable dis tance for admitting the wind to blow freely between these parts. The fins 13 carried by the cowl 12 are secured to the flange 18 as well as to the body portion of the cowl, and extend practically from the cylinder 6 to the outermost edges of the flange 18. These fins do not radiate from the center of rotation of the cowl, or in other words, lie in planes not tending to converge upon the shaft portion 15. These planes, if continued, would meet ata point a little distance to the right of the shaft portion 15 according to Fig. 3. They are almost out not quite tangenial with reference to the surface of the cylinder 6. They are so formed as to gather and concentrate a portion of such atmospheric wind as may chance to blow between the flanges 7, 1 8, the portion ofwind thus afi'ected being (11- rested upwardly sc usto of cylinder 6 and laterall l/ from; the wind thus diverted a trated produces, by aspiration draft within the cylinder and no draft is already present, and there be already'a draft through the parts in question, such draft is increased The operation of my device is as fol 1O lowsz The parts being assembled and ranged as indicated, if no wind be blowing, the ventilator merely serves as a fine for allowing heated air and gases to pass upwardly and make their escape. If, however, any wind is blowing, a portion of such windpasses between the flanges '7 and 18, and striking the fins 13 is deflected upwardly and concentrated so as to pass over the top of the cylinder ,6 and make its escape from the cowl. In doing this produces,

by aspiration, a partial vacus. cylinder 6 and funnel 5 constituting the draft member, and in this manner forces a draft within the draft member.

I find in actual practice that by the use of the fins 13 and particularly by forming them as shown and described and mount ing them as indicated, the atmospheric wind can be rendered very effective in producing 3 and increasing the draft through the ventilator. I also .find that the particular fornr of cowl herein shown is very elfective in preventing wind from blowing downwardly through-tho draft member. That is to say, if the wind strikes adjacent buildings or other structures and is deflected, it may have a tendency to blow downwardly, but with this form of'cowl it is impracticable for the wind to blow downwardly intothe draft 40 member -to any appreciable extent. The shifting of the cowl to different angles under control of the wind, and the concentrating and directing of portions of the wind so as to carry the same across the top of the draft member, as above described, will, also produce a forward forced draft through the ing a substantially frusto-conical"form, a

cowl located adjacent said draft member and pro-Y \led with aflange of substantially frusto-conical form, said last mentioned a t within the draft member, regardless of the direction in spaced Si; 1' ioned flange, and a p oi .nns carried said cowl and ext therefrom outwardly to the edges of said flange carried by said cowl, said fins divergas ing from each other forthe purpose de fleeting wind relatively to said draft member and thus forcing a draft within said draft memben. I 3

A. ventilator comprising a draft pipe, a frusto-conical flangemounted upon sai draft pipe, a cowl supported by said draft pipeand free to more under control of atmospheric wind into diiferent angular positions, relatively to said draft pipe, a flange carried by said cowl and 'havingja frustoconical form, said last mentioned flange being spaced apart from said first mentioned flange, and a pair of fins carried by said cowl and extending outwardly to the ed es 715 of said flange carried by said cowl, said ns lying in separate planes which diverge from a point displaced from the axis of rotatio of said cowl. v

3. A ventilator comprising a draft memher a flange mounted thereupon, a cowl rev olubly mounted upon said draft me1nber,;--ja flange carried by said cowl and disposed adiacent to said first mentioned flange s0 as to facilitatethe blowing of'wind between said flanges, and a plurality of-fins engaging said flange carried by said cowl and lying in divergent planes for the purpose of concentrating a portion of atmospheric wind and directing said portion across said draft 9O member in order to aspirate a quantity of air contained therein. 4:. A ventilator comprising a draft pipe, an arch mounted thereupon, a bridge e1:-

tending across said arch, a stirrup carried by said bridge, a stem engaging said, arch and said bridge, a cowl carried by stem and adapted to be shifted into different ositions by-the wind, a flange carried by- I said cowl, a flange carried by said draft pipe, and a plurality of fins carried by said cowl and engaging the flange thereof, said fins diverging for the purpose of controlling. currents of atmospheric air in order to cause the latter to aspiratethe air contained withv in saiddraft pipe.

J AM-ES K. ROBINSON. lVitnesses Enxnsr J. Bonn-m,- JAMES A. Coxuan. 

